Wrapping up the year in 2020, Ronian publishes a technical note describing how to apply a simple formula to compute the relative illumination of an un-vignetted imaging lens system in terms of image distortion, differential distortion, chief ray angle (in object space), and the size and shape of the entrance pupil.
Ronian publishes a white paper describing an extension of his earlier work on an optical design technique performed through sequential ray tracing to achieve uniform top hat illumination for extended sources (such as high-powered array LEDs) using only spherical lenses.
REJECTED! Ronian's latest manuscript was rejected by a journal. Click HERE (or on the picture below) to read open comments from other professionals on Linkedin! View Ronian's presentation slides on classical illumination principles and uniform illumination using spherical optics, which was shared at the Zemax Envision 2020 online conference!
Also, click on the image below to read a Linkedin version of this article, complete with a simple explanation, and Zemax lens files.
Also, click on the image below to read about Ronian's simple "home-made" optics experiment where he demonstrates this focusing effect using a magnifying glass and an ordinary LED desk lamp!